Engine Emission Control System Lincoln Town Car III рестайлинг

MATERIAL SPECIFICATION

MATERIAL SPECIFICATION

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

Note. Do not permanently remove or render inoperative any part of the vehicle emission control system including related hardware. Failure to comply may violate applicable state and federal laws.

The engine emission control consists of the

1. EGR system.
2. PCV system.

The EGR system returns a small amount of exhaust gas into the intake manifold. This reduces the overall combustion temperature. Cooler combustion temperatures provide a significant reduction of the oxides of nitrogen (NOx) in the exhaust emissions.

The EGR system module tube

1. connects the exhaust manifold to the EGR system module and provides a path to deliver exhaust vapors to the EGR system module.

The EGR vacuum regulator solenoid uses input from the PCM to achieve the calibrated level of EGR flow for various engine operating conditions.

The PCM controls the EGR system module opening via the vacuum regulator solenoid. When the EGR system module opens, exhaust gas flows to the intake manifold. The EGR system module transducer measures the delta pressure across the orifice located in the EGR system module gasket. This delta pressure signal is sent to the PCM providing an indication of the EGR mass flow that was delivered.

The amount of recirculated exhaust gas depends on

1. engine RPM.
2. intake manifold vacuum.
3. exhaust backpressure.
4. engine coolant temperature.
5. throttle position.

The PCV system uses intake manifold vacuum to ventilate blow-by vapors from the crankcase and return the vapors to the intake manifold for combustion. The PCV valve varies the amount of blow-by gases returned to the intake manifold based on available engine vacuum. The PCV valve also prevents the entry of combustion backfiring into the crankcase.

Scheme 10

Refer to the INTRODUCTION - GASOLINE ENGINES article.

Scheme 11

Scheme 12

1. For additional information, refer to the procedures in this article.

Exhaust Gas Recirculation (EGR) System Module

Material

REMOVAL AND INSTALLATION

1. Disconnect the EGR system module electrical and vacuum connectors.
2. Remove the 2 bolts and the intake manifold shield. To install, tighten to 12 Nm (9 lb-ft).
3. Disconnect the EGR system module tube-to-EGR system module fitting. To install, tighten to 40 Nm (30 lb-ft).
4. Remove the 2 bolts and the EGR system module. To install, tighten to 25 Nm (18 lb-ft).
5. Remove and discard the EGR system module gasket .
6. Clean the mating surfaces of any residual gasket material.
7. To install, reverse the removal procedure. Install a new EGR system module gasket with the side that has the raised circle facing the intake manifold.

Scheme 13

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(/lincoln/town-car/iii-2003-2011/remont/hoistjack/#jacking-and-lifting) article.
2. Remove the 2 bolts and the intake manifold shield. To install, tighten to 12 Nm (9 lb-ft).
3. Disconnect the tube fitting at the exhaust gas recirculation (EGR) system module. To install, tighten to 40 Nm (30 lb-ft).
4. Disconnect the EGR tube nut at the exhaust manifold. To install, tighten to 40 Nm (30 lb-ft).
5. Remove the EGR tube from the vehicle.
6. To install, reverse the removal procedure. If equipped with fire suppression system, repower the system.

Scheme 14

1. Disconnect the crankcase ventilation tube-to-PCV valve quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-system-general-information) article.
2. Disconnect the PCV valve electrical connector.
3. Rotate the PCV valve and remove.
4. To install, reverse the removal procedure.

Scheme 15

Scheme 16

LH crankcase ventilation tube

1. Disconnect the LH crankcase ventilation tube-to-air cleaner outlet pipe quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-system-general-information) article.
2. Disconnect the LH crankcase ventilation tube-to-valve cover fitting quick connect coupling and remove the tube. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-system-general-information) article.
3. Disconnect the RH crankcase ventilation tube-to-PCV valve quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-system-general-information) article.
4. Disconnect the RH crankcase ventilation tube-to-throttle body (TB) spacer quick connect coupling and remove the tube. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/lincoln/town-car/iii-2003-2011/remont/fuel-system/#fuel-system-general-information) article.
5. To install, reverse the removal procedure.

See also:
• INTRODUCTION - GASOLINE ENGINES
• JACKING AND LIFTING
• FUEL SYSTEM - GENERAL INFORMATION